Turbine-vane.



PATENTED DEC. 31, 1907.

' :r. r. M. PATITZ. I I TURBINE VANE.

PPPPP OATIOH FILED 0OT.19, 1903.

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with several rows of vanes.

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' struction could be'used UNITED STATES PATENT OFFICE.

JOHANN FRIEDRICH MAX PATITZ, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALLISCHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF- NEW JERSEY.

TURBINE-VANE.

Specification of Letters Patent.

Patented Dec. 31, 1907 Application filed October 19.1903. Serial No.177.661. 3

varies and fastening and locking means therefor.

The object of my invention is to provide simple and efficient means forfastening the vanes to either the stationary or rotating part of thesteam turbine, and to lock them positively. against movement in anydirec tion.

The invention is more particularly described in the followingspecification and shown in the accompanying drawings, in which:-

Figure 1 is a section of a radial fiow turbine wheel. Fig. 2 is a faceview of Fig. 1, one side plate being removed. Fig. 3 is a part sectionthrough an axial fiow turbine having a stationary, vane-bearing casingand a drum Fig.4 is a part section through a wheel similar to the oneshown in Fig. 3, with the addition of a surrounding ring for sup ortingthe outer ends of the vanes. Fig. 5 shows a modification of the lockingmeans. Fig. 6 is a view of the roll section from whic ma be cut.'

the wheel shown inFig. 1, the vanes 1 are inserted and held between sideplates 2 and 3, by means of end rivets 4, formed thereon. If theriveting alone is depended upon to hold the vanes in place unequalexpansion, or careless riveting, or other causes may so loosen thefastening that the vanes turn when subjected to their working strain,thus causing loss of efiiciency and posperspective the vanes provided ateach end of the vane, these PIOJGGtiODS fitting into shoulders 6, in theplates, which shoulders are formed by cutting away a part of the sideplates, as shown. .The projections 5, fit over the ledge thus formed,and firmly hold the vanes in place. It is evident that this same conwithany other form of wheel fastening, for instance, a screw fastoning.

Figs. 3, 4 and 5, show the vanes arranged In order to avoid this,p'roand the formation being separate vertically and likewise providedwithlooking means. In Fig. 3 there are two sets of vanes, one set beingstationary in the casing 7, and the other movable with the drum 8. The

projections 9 and 10, respectively, fit into grooves cut in the casingwall and the drum, as shown. The vanes carry only one stem forfastening, which may be either riveted or provided with a nut, as shown.Fig. 4 shows an exactly similar construction applied to a wheel whosevanes are united at their ex treme ends by means of a ring 11, to whichthe vanes are riveted. InFig. 5 is shown a reversal of the relativelocking means. A cut out portion of the vane fits over a correspondingprojecting rib on the wheel. The vanes shown may be cut out of a solidrolled bar of the form shown in Fig. -6. Dotted. lines show how the barmay be divided for this purpose.

Having thus described my invention, what I claim is 1. In aturbine, thecombination of a support comprising two walls, a series of vanes, andmeans for fastening the vanes between the walls, one of the walls havinga continuous formation coacting with the vanesto prevent their twisting.

2. In a turbine, a wheel or casin a set of wheel or casin 3. In aturbine, a wheel or casing, a set of vanes, and fastening means for thevanes, the wheel or casing having a common groove separate from thefastening means, and 'each vane havinga rojection thereon-fitting thegroove and locl iing the vanes against twist' in 4. In a turbine, awheel, a set of vanes, and fastening means for the vanes, the wheelhaving a common groove separate from the fas tenmglmeans and each vanehaving a projection t ereon fitting the groove so as to bring a surfaceofthe set of vanes flush with a Y wheel surface.

5. As anarticle of manufacture, a vane, and a fastening means at the endof the vane, the .vane being formed at an end for locking y from thefastening means. I

6. In a turbine, the combination of a su name to this specification inthe presence of port comprifsingf two wallsila series or: vanes, twosubscribing Witnesses. and means or astenin t e vanes etween T v theWalls, one of the Wal is being formed with FRIEDRICH MAX PATITZ' 5agroove ooaoting with the vanes to prevent Witnesses:

their twisting. G. SCHULSE PILLOS,

In testimony whereof I have signed my I O. G. SPRADO.

